Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db76d423b94bc6f3b85b41816f122c8a0ec19a63a311e1640a3eb1435130f34a' 
  AND token = 'Vx/W9K0AypmmaCUrnpYi/ypAa0E2iNdqcVhJ23NN3Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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