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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd93c6cdbabd78b897dee2d2d41ad912435584d169de85d30f3c525fb8dff06' 
  AND token = 'bUdTr5Mv8hndbRisrVFLXjKilU6921K4u1DHmwiLslM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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