Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b7664b1fdeb75e10e23c1d61e02b57861c998a2300a8ac851de513dbe968344' 
  AND token = 'TqsQsS57wSl/XktM5tzqB62DwWSKRM26bioKYuARE3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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