Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7909d397170979c74372a04812d74e0532ae3c9c8ffedad9772ef20e0fc468a' 
  AND token = 'uu7ZvFeLz0COzdZwDAuB0hxC8iJ94mfzcq7824l0/A4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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