SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98c9f7800e86445197865e1c7047299e8003b72e24783082e37302208f45d570' 
  AND token = 'AqCdv16lHBmVWM+j3hU85QJP3tS3w5KG+1rYOWGCnzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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