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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6fd8ac5c4e324fd214a344fa92910d0b2d159d9db4a0e569ecba6a026237ec9' 
  AND token = 'hHZUI6ao8ugLed8SIa+BAGo5xU+nVmZE7rq2AlsACNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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