Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4a0fc7a51455c12418c82fa966ee75fb26ebd1a7f37e0ad7ee6c00fd48a460' 
  AND token = 'D1UYF9HJKpgrJwrDY6gZZVB8mLPidPa2Rbywy3Q9P+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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