Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '74efa762c54303d03484978c4c53bcd65628f933962b3ea0a3317c47ba19871b' 
  AND token = 'm0IrnkSMuGR+e9LvWZV0xVw9ftVL9FQyio7dNopfbYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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