Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3d20e95457dbd2cbc4eed116557a0b3b75b15ce387457aa47c190c492e27ecf' 
  AND token = 'qYBo2PZIyUE3mRTk4oJLFr/cj1tO6IkPi256OvREsIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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