Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd733ac48c62a4112ee4111dd8c5170303419f9776276b12e7938b3a2a300b651' 
  AND token = '+V5rTQTycv3Vb/2unHNRr5n7JfGpaYBa0fkIG6N9yT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}