Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b45a0486a82051b0527e1a6b604cb0025992a934588f892ad8c59df83e6a463' 
  AND token = 'RB1RiFbuuybtQEU3Pw9jobv4oNBA6TaHpaL5K5/tcaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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