Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f66b4dffffcbdbe00412abcc0e4bb4f0b83e4eb58bd161cc34c093336a4b5a' 
  AND token = 'xxmHH7Hh2N0W1lGNsz++Z2VR7+9c5ZFV1xC7lKezAoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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