Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5de2695abed03d20b090ab59586ddcd12238619c8f40a4413a36624b77290a68' 
  AND token = 'rst1pAe7EdOw/T3DRQI+kR146lA3NSIXv8Po7qrVXok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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