Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcdff6a423bab24c56d6051589108c8b63a2384f458065622b6533fa33222879' 
  AND token = 'BxRWv+ULP+Z4Lhn2R5NkLdwnBsCJWLJlBUbuT/E14to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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