Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2144bfef730517a74f7d1561d134f3b4523c36454de2f894e057dbf1291c4041' 
  AND token = '/meAmsRJA5BbsLf2J2zdgDt+3bLl4QJJiuDqeUTW4gE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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