SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba190124f2c5d2595ef7c2381d07512602fb555bf7c0b1790bab7390b55d1a4' 
  AND token = '1oqJnvPKJg4YAbR7+LQT/dItI6m5uCMBuEjvIHfqsVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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