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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '868e262a92c06c523c5a5537562ed53625617b805be72dd8f5e5dba2c139a7d1' 
  AND token = 'TFe8eYO9MZ8l4XMI9crvBLhPhidlAQssAc4aNR2sjiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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