Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1113ea4bdc50430bdfcddd74cceb0fec0b965ece06df0e4c415256b8d839be6' 
  AND token = 'GbtfYqay2c4MpHv+6463wQ5nJqdTmCib2Qw2rZPShw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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