Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dfb10de6f9ab8b98b5bb46cd6223bc1c1336ee58e846a348e1b446156e165c4' 
  AND token = 'NqnlJA2lY/Y3zX3tlkRm7vlRnnz/qNSoZo6xDiakNhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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