Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c29767aa53fe79d358adc087f8f7ff2934002ded547a92b20e314ada70a48a7a' 
  AND token = 'qOnMSp4URrXfmpXnWSxmWMEW8aaaceldYFFG38kpDL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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