Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40c2152835de45b108f75c75924ea92f8e48a2cdceca087f40373e723b7538d1' 
  AND token = '60C53CYk7fTSp3VYxKNH2ZDMpPmdbq2X2MpnvWoaKNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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