SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9526c03c447f759994d5113f99dc20c95b1d477e80247cf1e056a180a23e29e0' 
  AND token = 'VfusztGaWnEzklHxJKUqpD5IeZ48Hv9lmCKfBNF1sow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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