Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f23237f50e620579dd77d3bc0bcbadd29c33959b9bc18cc99297e613fc21c52e' 
  AND token = 'Y52WjJhYX4qt8/HZ3/ZzXL6DcwbDFLrkr3h7REMwFNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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