Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65c0867ff4ca990c39668de755f2911f0db8848f4a0c5a62180f032aaae6bf75' 
  AND token = 'CUN1G0GPZ8U49JbntBGoBdStUYcOk07sASV4w6QNCHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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