Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd6f8e5b5764f2950b12faaf91b3f9f2a594e448db018b9ab0fb32e547c1521c' 
  AND token = '8kw88dRaHpqR28leqgQGPEIVVIAQI6Vs4YYHTt3gdQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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