Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc39a38595e5cebe17089e4dba9daa33196ae85f618509f0f7bb3190f83c96f4' 
  AND token = '8nHisLP2g87OO2Lu1pVH8SUyLUMierQJauAMeRMLHNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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