Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6868b376dbbb01717e99fe02d957448bfba5f6d5094945690880361293330177' 
  AND token = 'FE7cdofIJJcA0f72bwamdLmolLHr+g2KJ2xhgDBmMrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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