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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f443ffd3218cec1fdbb6f30d4b3e6f51931a499dae7e8f1bc041f6136320f2' 
  AND token = 'x1HwPEaWzYnKo0lwIicf0anrGnU8SLSAbfiYLyki3qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}