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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ed6f485c88704583589af2117adc8a3e50760605c1bd96992619c00c5117faa8' 
  AND token = 'DHHo9KA5TFgT+qLQaUdgku2jbe0eddlstdCfWzWv6Rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}