Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd58e4d5c2a4a0202f4be5a3b789be824b1143cc3767479962dcb22571bc041d3' 
  AND token = 'idwBoRXLVBgxOAau8QacGSEreCRfv6bcEu8iYMzqZnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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