Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dec18ec324df0248a81b076279addebc937e64b6f7af93ffb6817dd9e11c34d9' 
  AND token = 'HfvEK3p6AJk7XFfJMLpFXE5jbrvJFXtsK4BYWm61Hms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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