Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '082cb07e550b80e85532b0341484d1b10f8ccf77c839f2844fee968b8b2b66da' 
  AND token = '0upelTuCPCIImCSUz7MJM4A5QeAvTQLl9CHAf6vUccc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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