Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd93cc88412cc0eecb59f29a8e8fce19e141c1476d37a67b005a4fb990dc277f9' 
  AND token = 'CyAeLDPSkQoWfovPZHjU/clRJC32DD0cfHa1z30vIWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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