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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9c611d6e1f8c25817a4ccb6c0d9416a33e42e3b7e48f032c56c4e421b1013f1' 
  AND token = 'GghbKluh1C2ZFqy6u078rPQITsqRmpoyxKl/FNM0kwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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