SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '155af4e13661e9ee12286ca247ddb3bfdcc7f009c3436ff5792d6f234999b576' 
  AND token = 'Hp4LYUmD+y75t0Yy/d3AdROrwvZV8HZfwL/7dw7njiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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