SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5ca68acb8a25215844f8ab454db5d598b1f7e16d0b5df191e355e6f68207d60' 
  AND token = 'vobTX0Q7IlcL4oltM/GYvg+3CFVLhJ8yLJNKkiwct0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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