Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '00b0a9ee1fa0920f4c4dd05e841abe0434bde9c248d48debee08277e92a3fe7f' 
  AND token = 'pUQUrEv7nxOKtZhVKmRe1cqT5AYXAOq3JdKLNULC5ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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