Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c865b7296cc2db4223e3a3493b7ea4c0a44ae3ba1e047be54d13cca07bc987a' 
  AND token = 'QAoikggfVD1MlNGYd9Lreir+Q2CF184UOhYg3oyZFHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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