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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a01c26447e68908ebb1a706c0c5be1388c038c62e60523cc832d2b772079237b' 
  AND token = 'hYp5zBkcVbZ0tfLrqKCP2Mw5SqmZT9/yJWUUIMCa6ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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