Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a7c549d7e93c7963fa08cb5147a9e3af6a9417e04123343b3ae9dc3cc9ae14a' 
  AND token = 'MS9zqPmcG3uzhr0r1hN8IrUapG7YHNmmmo14y2bOFHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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