Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00171c391126649125ec61668bcd2e295de9f59730af4b77afecd9bea6494a2e' 
  AND token = '+kCPS75HPmBoBCa8oQK27dk9o+W54elD8gzJA8GsBCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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