SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f38fd5dc324fa48f026369a28539fe4b9b40b47b7d5cba037759ffd1596a9f5a' 
  AND token = 'fTHx0vrouLpppHVX8s6PFCGDmoBqnlH/S+m+JarWkcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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