SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95c1883005d82fcd47d2baad9e84e653010ab04947905a8aef3d29573718f2cd' 
  AND token = 'ippE8uXLp9Bw51Z5h8CX7m94NA82m0m9yYTl9DwdIxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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