Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25e1845e196cd2908a46e5fee4143af34146e9ebe72376cce798902db199a77f' 
  AND token = '3PXSPp6s0pyJ8lmZsENNOUXFhfVyOkeI67A6+F2Z+fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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