SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d705639b53448b3e610a1c732a473c1b77843eeacd234cbbd48d05fe7c5915a' 
  AND token = '3iMsG/I8JtE+7gqw+o2TyJl7whiIKZHKHHLmAAz45rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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