SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1630aebfa83f02ea2db5918f7d02f582bcf89b0a34963bdd2894b0605af99184' 
  AND token = 'dWOP6zA7gMLuvwXq5UU/JNgjvbVKlJjmg0dFsRvRXxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}