Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7885b7f9fbdb4c591157bb1fc2e051f463016abce2b6bb09de757c34f89eacab' 
  AND token = 'cQ8QorYcuv4SgVetyEszravOMmpoia+QR7o8wi5OxP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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