Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a805c087ce64f8630ebcd6a8e6d432fbfe808f0068fe4acdb877e39971198313' 
  AND token = 'o0zI4lt4QYK7AKkFf+2u8Rd8QEYQ3+Basi2TfMTkWhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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