SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ee0c518d4c1345697dfb22624cd8b1acca7fff47eb85f5522edfabb05483f36' 
  AND token = 'adbgW+PSYyVt4AR1s+pJYwLnt0B2+UB9JM+KF3X07og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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