Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0030d8a11db2800c625f9fbb98259988b2f1baae5c0cdee3818ec50c6eba3a0' 
  AND token = 'PldFOokcZwmmegx0HdUsmIHFXXMGp7fJ5H1AV+jN6PY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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