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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '732faec9ebbccee229063ad3f6be073adaefc46c05454020c1191a6b3641b825' 
  AND token = 'B1GlyFzCfoTSZ1VXoVwx/xem5cVLi5S6P+e/DC510q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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