Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3563758b65380794938b6534db0e9724913c62dc865223b9b00558242a1e5f0' 
  AND token = 'C/u00lQ75NrwmuvqYl8dwelnKn8R+27Lff2HxR1m0Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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