SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1f1913d402f409e36a3acb58e7f78b3855033b17f14938765c779c592da03a5' 
  AND token = 'PcHkn2jSXlCWGhU/2+MjFFL/st2Y4vQRbdxwN2IVhJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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