Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1262f9461e752027427c2534d2bfd541ff4162935b3b955f061629dc429a710' 
  AND token = '66qje3QS3/Cj/8jUPpfR0DTEdhqyOQEHx/GO894BjGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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