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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9069e01f5b9fb63fc2b5fe0a08be1e1c1ca9ef1fabfe5d64164a49f960a2b8c1' 
  AND token = 'QSGD2ML/2v+jgbWiE/V1KhCkTl2TBNl9rnWbv+ymRDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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