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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98fc5854cc7ebd7a8e539823461347780cbcf360b4eb006dcedcd40f22cc833e' 
  AND token = 'lT9Yxy3ACgQQienXTceS5ZoROXykRS2uhj1Yh/avvHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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