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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0c050ceffbab0a9a065c38dad11194f234da12aab1ba9dd7bae39fe8bf4b2a57' 
  AND token = 'iJgBcVVgzjIbD5d3rXlkHfCmztgBmx3y1pSjyf3PS0w=' 
  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"
    }
  }
}