Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b2db083bb11079e00cc61d959cda8c3d5bcd64f9c92554d93c260437f947bab' 
  AND token = '99+JjVHqFwd3qm1FH2GnWDxINuJ40e4WJgR01xZILEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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