Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9d3ee30598f981102d915a0f2a492aafa96ed9ac08dc9d8ba50c0ad697e01dd' 
  AND token = 'YZpyD9c0NU5KGkyP0RERMikqoObSLowsBgF9gKKXrdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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