Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d55335350341bd897e714ada5f5932c9aca2dfe1b37cbc28a855dc02ad1253c' 
  AND token = 'pbzfH+UjGAazAvKo3DUXf9A/EdjKgzNUTtL8roE6up4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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