Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad43bcf50fdd3f7b6ad5c9c7b2f7a6a0bffc71acbd3dfdf948af133e50b0a8a' 
  AND token = 'iHTS6yU7Zp5/itgORcHCvl3/SZXfVup0wL5UzuV0oh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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