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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f4fa566a300c8db8d464f7f6eb7dfe2c33766ecc84be66f29a6f9cc74ac4628' 
  AND token = 'huiPOlU6XXZsHVwqE3JZWVv6ZE+mLtnKp2D2n31VlP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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