Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aceed2dcbfb59139d05ce7cb22c1ee4fc03648baf507efcf55477b5f618978ca' 
  AND token = 'xtwzF89f4jm2oyRs0chosthrgEHyuVkace30jNJdTu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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