Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2521b82125de9ece2c4e8029bc1ff9a7f093a493dfdb7e4e4254a578917cedce' 
  AND token = '4H4yi9PZsCG74x0dCicGbJineD2OF6isowkmnvCpmog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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