Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fe78ecafde8224094378a74f96a92b99d85d5b4e6180710c6ee37c8c151720e' 
  AND token = 'Rv+hDXxdway7//rQfx29Kz6i3V2APvdOsfh5RlQFLbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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