SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f6304e6c799df803b14965ffdc72d5c9c732ed1bec5d6136d5b1e9b20a198a0' 
  AND token = 'TIBjTzYueLmN2blv+n04DccugJSNwfBL3MuKSnvzr7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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