Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13c79b2bcb890108d6d2f686e61d692076f51462e808edbe2a11e100cafdcc78' 
  AND token = '/bHBhiR4/W+udLB4PFngwU4VBigbts9tLecqWVszvc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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